PATHOLOGY

Detailed explanation-1: -The acquired immune system, with help from the innate system, makes special proteins (called antibodies) to protect your body from a specific invader. These antibodies are developed by cells called B lymphocytes after the body has been exposed to the invader. The antibodies stay in your child’s body.

Detailed explanation-2: -When antibodies attach to an antigen (think a lock–key configuration), it signals other parts of the immune system to attack and destroy the invaders. This is how the human body develops immunity (acquired) to a particular disease.

Detailed explanation-3: -IgG antibodies are responsible for most antiviral activity in serum, while IgA is the most important antibody when viruses infect mucosal surfaces.

Detailed explanation-4: -Antibodies are proteins made by B cells (part of the body’s immune system) with each B cell producing unique antibodies that recognize a specific epitope on the antigen. An antigen is any substance that provokes an immune response – something foreign or toxic to the body.